package com.sky.service.impl;

import com.sky.dto.GoodsSalesDTO;
import com.sky.entity.Orders;
import com.sky.mapper.OrderMapper;
import com.sky.mapper.UserMapper;
import com.sky.service.ReportService;
import com.sky.service.WorkspaceService;
import com.sky.vo.*;
import io.swagger.annotations.ApiOperation;
import io.swagger.models.auth.In;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang3.StringUtils;
import org.apache.poi.xssf.usermodel.XSSFRow;
import org.apache.poi.xssf.usermodel.XSSFSheet;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.web.bind.annotation.GetMapping;

import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.InputStream;
import java.time.LocalDate;
import java.time.LocalDateTime;
import java.time.LocalTime;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;

@Service
@Slf4j
public class ReportServiceImpl implements ReportService {
    @Autowired
    private OrderMapper orderMapper;
    @Autowired
    private UserMapper userMapper;
    @Autowired
    private WorkspaceService workspaceService;


    /*
    1.营业额统计
     */
    @Override
    public TurnoverReportVO getTurnoverStatistics(LocalDate begin, LocalDate end) {
        //当前集合用于存放从begin到end范围内的每天的日期
        List<LocalDate> dateList = new ArrayList<>();
        dateList.add(begin);
        while (!begin.equals(end)){
            // 日期计算，计算指定日期的后一天对应的日期
            begin = begin.plusDays(1);
            dateList.add(begin);
        }
        // 日期统计字符串
        String dateStr = StringUtils.join(dateList, ",");

        //当前集合用于存放从begin到end范围内的每天的营业额
        List<Double> turnoverList = new ArrayList<>();
        for (LocalDate date : dateList) {
            //查询date日期对应的营业额数据，营业额：状态为“已完成”的订单金额合计
            LocalDateTime beginTime = LocalDateTime.of(date, LocalTime.MIN); // date这一天的00：00：00
            LocalDateTime endTime = LocalDateTime.of(date, LocalTime.MAX); // date这一天的23：59：59.....
            // select sum(amount) from orders where order_time > ? and order_time < ? and status = 5
            Map map = new HashMap();
            map.put("begin",beginTime);
            map.put("end",endTime);
            map.put("status",Orders.COMPLETED);
            Double turnover = orderMapper.sumByMap(map);
            turnover = turnover == null? 0.0:turnover;
            turnoverList.add(turnover);
        }
        // 营业额统计字符串
        String turnoverStr = StringUtils.join(turnoverList, ",");

        return TurnoverReportVO.builder()
                .dateList(dateStr)
                .turnoverList(turnoverStr)
                .build();
    }
    /*
    2.用户数据统计
     */

    @Override
    public UserReportVO getUserStatistics(LocalDate begin, LocalDate end) {
        // 1.dateList统计
        //当前集合用于存放从begin到end范围内的每天的日期
        List<LocalDate> dateList = new ArrayList<>();
        dateList.add(begin);
        while (!begin.equals(end)){
            // 日期计算，计算指定日期的后一天对应的日期
            begin = begin.plusDays(1);
            dateList.add(begin);
        }
        // 日期统计字符串
        String dateStr = StringUtils.join(dateList, ",");

        // 2.newUserList、totalUserList统计


        //当前集合用于存放从begin到end范围内的每天的新增用户数量
        // select count(id) from user where create_time < ? and create_time > ?
        List<Integer> newUserList = new ArrayList<>();

        //当前集合用于存放从begin到end范围内的每天总的用户数量
        // select count(id) from user where create_time < ?
        List<Integer> totalUserList = new ArrayList<>();

        for (LocalDate date : dateList) {
            LocalDateTime beginTime = LocalDateTime.of(date, LocalTime.MIN);
            LocalDateTime endTime = LocalDateTime.of(date, LocalTime.MAX);
            Map map = new HashMap();
            map.put("end",endTime);
            // 获取总的用户数量
            Integer totalUser = userMapper.countByMap(map);
            // 新增用户量
            map.put("begin",beginTime);
            Integer newUser = userMapper.countByMap(map);
            totalUserList.add(totalUser);
            newUserList.add(newUser);
        }

        // 每天总用户量统计字符串
        String totaluserStr = StringUtils.join(totalUserList, ",");
        // 每天新增用户量统计字符串
        String newuserStr = StringUtils.join(newUserList, ",");


        return UserReportVO.builder()
                .dateList(dateStr)
                .totalUserList(totaluserStr)
                .newUserList(newuserStr)
                .build();
    }
    /*
    3.订单统计
     */
    @Override
    public OrderReportVO getOrderStatistics(LocalDate begin, LocalDate end) {
        // 1.dateList统计
        //当前集合用于存放从begin到end范围内的每天的日期
        List<LocalDate> dateList = new ArrayList<>();
        dateList.add(begin);
        while (!begin.equals(end)){
            // 日期计算，计算指定日期的后一天对应的日期
            begin = begin.plusDays(1);
            dateList.add(begin);
        }
        // 日期统计字符串
        String dateStr = StringUtils.join(dateList, ",");

        // 2.orderCountList和validOrderCountList统计
        //当前集合用于存放从begin到end范围内的每天的订单总数
        List<Integer> orderCountList = new ArrayList<>();
        //当前集合用于存放从begin到end范围内的每天的有效订单数
        List<Integer> validOrderCountList = new ArrayList<>();
        for (LocalDate date : dateList) {
            LocalDateTime beginTime = LocalDateTime.of(date, LocalTime.MIN);
            LocalDateTime endTime = LocalDateTime.of(date, LocalTime.MAX);
            // 查询每天的订单总数 select count(id) from orders where order_time > ? and order_time < ?
            Map map = new HashMap();
            map.put("begin",beginTime);
            map.put("end",endTime);
            Integer orders = orderMapper.countByMap(map);
            // 查询每天的有效订单数 select count(id) from orders where order_time > ? and order_time < ? and status = 5
            map.put("status",Orders.COMPLETED);
            Integer validOrders = orderMapper.countByMap(map);

            orderCountList.add(orders);
            validOrderCountList.add(validOrders);
        }
        // 每天总订单统计字符串
        String orderCountStr = StringUtils.join(orderCountList, ",");
        // 每天有效订单统计字符串
        String validOrderCountStr = StringUtils.join(validOrderCountList, ",");

        // 3.总订单数量
        Integer totalOrderCount = orderCountList.stream().reduce(Integer::sum).get();
        // 4.总有效订单数量
        Integer validOrderCount = validOrderCountList.stream().reduce(Integer::sum).get();
        // 5.订单完成率
        Double orderCompletionRate = 0.0;
        if(totalOrderCount != 0) {
            orderCompletionRate = validOrderCount.doubleValue() / totalOrderCount;
        }
        return OrderReportVO.builder()
                .dateList(dateStr)
                .orderCountList(orderCountStr)
                .validOrderCountList(validOrderCountStr)
                .totalOrderCount(totalOrderCount)
                .validOrderCount(validOrderCount)
                .orderCompletionRate(orderCompletionRate)
                .build();
    }
    /*
    4.统计指定时间区间内销量前10
     */
    @Override
    public SalesTop10ReportVO getSalesTop10Statistics(LocalDate begin, LocalDate end) {
        LocalDateTime beginTime = LocalDateTime.of(begin, LocalTime.MIN);
        LocalDateTime endTime = LocalDateTime.of(end, LocalTime.MAX);

        List<GoodsSalesDTO> salesTop10 = orderMapper.getSalesTop10(beginTime, endTime);

        List<String> names = salesTop10.stream().map(GoodsSalesDTO::getName).collect(Collectors.toList());
        String nameStr = StringUtils.join(names, ",");
        List<Integer> numbers = salesTop10.stream().map(GoodsSalesDTO::getNumber).collect(Collectors.toList());
        String numberStr = StringUtils.join(numbers, ",");

        return SalesTop10ReportVO.builder()
                .nameList(nameStr)
                .numberList(numberStr)
                .build();
    }
    /*
     5.导出运营数据报表
     */
    @Override
    public void exportBusinessData(HttpServletResponse response) {
        // 1. 查询数据库，获取营业数据 --最近30天
        // 获取30天前和昨天
        LocalDate dateBegin = LocalDate.now().minusDays(30);
        LocalDate dateEnd = LocalDate.now().minusDays(1);
        BusinessDataVO businessDataVO = workspaceService.getBusinessData(LocalDateTime.of(dateBegin, LocalTime.MIN), LocalDateTime.of(dateEnd, LocalTime.MAX));

        // 2. 通过POI将数据写入到Excel文件中
        InputStream in = this.getClass().getClassLoader().getResourceAsStream("template/运营数据报表模板.xlsx");

        try {
            // 基于模板文件创建一个新的Excel文件
            XSSFWorkbook excel = new XSSFWorkbook(in);
            // 获取表格文件的Sheet页
            XSSFSheet sheet = excel.getSheet("Sheet1");
            // 填充数据 -- 时间
            sheet.getRow(1).getCell(1).setCellValue("时间："+ dateBegin+ "至" + dateEnd);
            // 填充数据 -- 营业额
            // 获取第4行
            XSSFRow row = sheet.getRow(3);
            // 填充数据 -- 营业额
            row.getCell(2).setCellValue(businessDataVO.getTurnover());
            // 填充数据 -- 订单完成率
            row.getCell(4).setCellValue(businessDataVO.getOrderCompletionRate());
            // 填充数据 -- 新增用户
            row.getCell(6).setCellValue(businessDataVO.getNewUsers());
            // 获取第5行
            row = sheet.getRow(4);
            // 填充数据 -- 有效订单
            row.getCell(2).setCellValue(businessDataVO.getValidOrderCount());
            // 填充数据 -- 平均客单价
            row.getCell(4).setCellValue(businessDataVO.getUnitPrice());

            // 填充明细数据
            for (int i = 0; i < 30; i++) {
                LocalDate date = dateBegin.plusDays(i);
                // 查询某一天的营业数据
                BusinessDataVO businessData = workspaceService.getBusinessData(LocalDateTime.of(date, LocalTime.MIN), LocalDateTime.of(date, LocalTime.MAX));
                // 获得某一行
                row = sheet.getRow(7 + i);
                row.getCell(1).setCellValue(date.toString());
                row.getCell(2).setCellValue(businessData.getTurnover());
                row.getCell(3).setCellValue(businessData.getValidOrderCount());
                row.getCell(4).setCellValue(businessData.getOrderCompletionRate());
                row.getCell(5).setCellValue(businessData.getUnitPrice());
                row.getCell(6).setCellValue(businessData.getNewUsers());
            }

            // 3. 通过输出流将Excel文件下载到客户端浏览器
            ServletOutputStream out = response.getOutputStream();
            excel.write(out);
            out.close();
            excel.close();
        } catch (IOException e) {
            throw new RuntimeException(e);
        }
    }
}
